feat: more image formats

Legacy/Legacy.csproj

@@ -206,6 +206,7 @@
     <Compile Include="RSystem\ArcRAD.cs" />
     <Compile Include="RSystem\ImageRSG.cs" />
     <Compile Include="Ruri\ArcKBM.cs" />
+    <Compile Include="Ruri\ImageKBM.cs" />
     <Compile Include="Brownie\ArcNAF.cs" />
     <Compile Include="Brownie\AudioWAV.cs" />
     <Compile Include="Discovery\ArcDAT.cs" />

Legacy/PenguinWorks/ImagePXL.cs

@@ -37,6 +37,8 @@ namespace GameRes.Formats.PenguinWorks {
         public override ImageMetaData ReadMetaData(IBinaryStream file) {
             uint width = file.ReadUInt32();
             uint height = file.ReadUInt32();
+            if (file.Length != 8 + 3 * width * height)
+                return null;
             return new ImageMetaData {
                 Width  = width,
                 Height = height,
@@ -53,7 +55,7 @@ namespace GameRes.Formats.PenguinWorks {
         }
 
         public override void Write(Stream file, ImageData image) {
-            throw new System.NotImplementedException ("PxlFormat.Write not implemented");
+            throw new System.NotImplementedException("PxlFormat.Write not implemented");
         }
     }
 }

Legacy/Ruri/ImageKBM.cs

@@ -0,0 +1,58 @@
+//! \file       ImageKBM.cs
+//! \date       2026-04-16
+//! \brief      Ruri System image format.
+//
+// Copyright (C) 2026 by morkt
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//
+
+using System;
+using System.ComponentModel.Composition;
+using System.IO;
+
+namespace GameRes.Formats.Ruri {
+    [Export(typeof(ImageFormat))]
+    public class KbmFormat : ImageFormat {
+        public override string         Tag { get { return "KBM"; } }
+        public override string Description { get { return "Ruri System image format"; } }
+        public override uint     Signature { get { return 0; } }
+        public override bool      CanWrite { get { return false; } }
+
+        public KbmFormat() {
+            Extensions = new string[] { "Kbm" };
+        }
+
+        public override ImageMetaData ReadMetaData(IBinaryStream stream) {
+            if ((stream.Signature & 0xFFFFFF) != 0x4D424B)
+                return null;
+            stream = BinaryStream.FromStream(new StreamRegion(stream.AsStream, 0x100), stream.Name);
+            return Bmp.ReadMetaData(stream);
+        }
+
+        public override ImageData Read(IBinaryStream stream, ImageMetaData info) {
+            stream = BinaryStream.FromStream(new StreamRegion(stream.AsStream, 0x100), stream.Name);
+            return Bmp.Read(stream, info);
+        }
+
+        public override void Write(Stream file, ImageData image) {
+            throw new NotImplementedException("KbmFormat.Write not implemented");
+        }
+    }
+}